MainWindow.xaml.cs

using DevExpress.Mvvm;
using System;
using System.Collections.Generic;
using System.Windows;

namespace CustomWorkTimeExample {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
        }
        private void SchedulerControl_CustomWorkTime(object sender, DevExpress.Xpf.Scheduling.CustomWorkTimeEventArgs e) {
            if (e.Resource.Id.Equals("1")) {
                if (e.Interval.Start.Day % 2 == 0) {
                    List<TimeSpanRange> workTimes = new List<TimeSpanRange> {
                        new TimeSpanRange(TimeSpan.FromHours(0), TimeSpan.FromHours(3)),
                        new TimeSpanRange(TimeSpan.FromHours(5), TimeSpan.FromHours(8)),
                        new TimeSpanRange(TimeSpan.FromHours(10), TimeSpan.FromHours(11))
                    };
                    e.WorkTimes = workTimes;
                } else
                    e.WorkTime = new TimeSpanRange(TimeSpan.FromHours(8), TimeSpan.FromHours(20));
            }
            if (e.Resource.Id.Equals("2")) {
                if (e.Interval.Start.Day % 2 == 0)
                    e.WorkTime = new TimeSpanRange(TimeSpan.FromHours(14), TimeSpan.FromHours(18));
                else
                    e.WorkTime = new TimeSpanRange(TimeSpan.FromHours(8), TimeSpan.FromHours(12));
            }
            if (e.Resource.Id.Equals("3"))
                e.WorkTime = new TimeSpanRange(TimeSpan.FromHours(14), TimeSpan.FromHours(21));
            if (e.Resource.Id.Equals("4")) {
                List<TimeSpanRange> workTimes = new List<TimeSpanRange> {
                    new TimeSpanRange(TimeSpan.FromHours(8), TimeSpan.FromHours(11)),
                    new TimeSpanRange(TimeSpan.FromHours(13), TimeSpan.FromHours(17))
                };
                e.WorkTimes = workTimes;
            }
        }
    }
}